683 lumen
When F is measured in lumens and ¢>o(/I) in watts, K I 683 lumen W71. In practice, the integral in Equation (4.202) need only be evaluated between 360 nm and ... ,The candela is the base unit of luminous intensity in the International System of Units (SI); that ... A 25 W compact fluorescent light bulb puts out around 1700 lumens; if that light is radiated equally in all directions (i.e. ... The arbitrary (1/683) t
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 683 lumen 相關參考資料
1. 輻射束(joulesec) 2. 光束光通量(lumen) 3. 光度(Candela, cd ...
對均勻的點光源而言，F (lumen) = 4πI (單位為燭光). 其中4π ... 標準的明視覺(V(λ):峰值555 nm，光譜光效能最高值Km(λ)= 683 lm/W)與暗視覺(V'(λ);峰值. 507 nm， ... http://ocw.nctu.edu.tw Building Scientific Apparatus - 第 250 頁 - Google 圖書結果
When F is measured in lumens and ¢>o(/I) in watts, K I 683 lumen W71. In practice, the integral in Equation (4.202) need only be evaluated between 360 nm and ... https://books.google.com.tw Candela - Wikipedia
The candela is the base unit of luminous intensity in the International System of Units (SI); that ... A 25 W compact fluorescent light bulb puts out around 1700 lumens; if that light is radiated equa... https://en.wikipedia.org LEDshift == luminous flux (lm, Lumen) ,light-current, lm ...
Km has a value of 683 lumen/Watts), it is a fixer value, multiplied by the spectral light sensitivity degree associated for the respective wavelength http://www.ledshift.com Lumen (unit) - Wikipedia
... the optical spectrum) has luminous flux of 683 lumens. So a lumen represents at least 1/683 watts of visible light power, depending on the spectral distribution. https://en.wikipedia.org Luminous efficacy - Wikipedia
Luminous efficacy is a measure of how well a light source produces visible light. It is the ratio of luminous flux to power, measured in lumens per watt in the ... Photopic luminous efficacy of radiat... https://en.wikipedia.org Luminous Flux - Hyperphysics
The lumen is the standard unit for the luminous flux of a light source. ... Luminous flux in lumens = Radiant power (watts) x 683 lumens/watt x luminous efficacy. http://hyperphysics.phy-astr.g PHYSICAL METHODS, INSTRUMENTS AND MEASUREMENTS – Volume II
Yuri Mikhailovich Tsipenyuk. I.I.Zasavitskii (luminance) Lv or B. 2 0 683(lumen/W) ()() [lm/(msr)] B wVdλλ λ ∞ = ∫. , Here the spectral radiance is weighted by the ... https://books.google.com.tw Road Lighting for Safety - 第 46 頁 - Google 圖書結果
A lumen therefore is a watt 'weighted' in accordance with the V- curve. ... These 683 lumen per watt (Im/W) indicate the 'maximum efficiency' of a light source. https://books.google.com.tw The Science of Measurement: A Historical Survey
Thus we can say that maximum luminous efficiency is 683 lumen per watt, or 1m/ W. Though this would be the most efficient and economical light source, ... https://books.google.com.tw |